The company said disruption to train services through the stations concerned was expected until 6pm.

18:12

Services are now back on the move

Disruption is predicted until 7pm although services are now up and running.

17:31

Arriva Trains Wales has said train services running through these stations may be delayed by up to 45 minutes.

17:24

An Arriva Trains Wales spokesman said:

We can confirm that a train developed a fault shortly after leaving Neath station at around 4.30pm and as a result some delays have been caused to services towards Swansea.

The train has now been moved and subsequent services are running towards Swansea again.

There is likely to be some knock on effects from the delay and we would like to apologise to all customers affected as we work closely with our partners in Network Rail to minimise any further disruption.”

17:19

This is the information Arriva Trains Wales has on their website:

Due to a fault on this train between Neath and Skewen the line towards Swansea is blocked. Train services through these stations may be subject to disruption on all routes. Disruption is expected until 18:00 21/05. Route(s) affected: Cardiff - Swansea. First Train(s) affected: 1E95 15:09 Cardiff Central - Llanelli. Passengers may be entitled to compensation for the delay caused to this journey. Full details of Arriva Trains Wales compensation policy and a claim form can be found at www.arrivatrainswales.co.uk/PassengersCharter/